Marley Sustainable Drainage Rainwater Harvesting Kits ... - BHL.co.uk

RAINWATER HARVESTING KITS - INSTALLATION MANUAL
Installation of controls
Important :
• The electrical installation of this equipment must be carried out
by suitably qualified persons. If in doubt, consult a qualified
electrician.
• This equipment must be supplied from a 13A switched power
supply through a residual circuit breaker (RCD) having a rated
trip current of 30mA. The switch must isolate the live and
neutral connections from the supply.
• The supply cable from the RCD to the control housing must
be of a type suitable for external use and must have a 240V,
13A rating.
• Before commencing work on the installation, ensure that the
intended mains connection point has been isolated.
• If the control housing is to be located some distance from the
service duct, cables should be run in conduit.
Although the USW100 and USW200 control housings are
fully waterproof and can be externally wall mounted, a
sheltered or internal location is preferred to prevent the
risk of frost damage during winter months. If the USW100
housing is to be fitted outside it is advisable to leave the
unit switched on during periods of cold weather. Failure
to do so could result in damage to the circuit board.
The level sensing system on the USW200 unit is sensitive to large
temperature fluctuations, so in order to maintain accuracy of the
visual indicator it is advisable to locate the control housing in a
sheltered area away from direct sunlight. Any exposed sections of the
level sensing tube should ideally be run in insulated Equator pipe.
a) Remove the control housing cover and disconnect the ribbon
cable from the fascia circuit board by gently pulling the brown
collar back (See figure 12). Note: when replacing the cable, the
silver contacts must face down towards the fascia circuit board
- if the cable is twisted when the cover is replaced, the
connection is incorrect.
b) Mark and drill the wall as shown on figure 12 and fix the
control housing in position using the No.6 x 30mm screws
provided.
c) Tape the pump and float switch cables (and the level sensing
tube for USW200 installations) to the end of the 15mm
Equator pipe and feed through from the inlet chamber to the
intended location for the control housing.
d) Cut the pump and float switch cables to a suitable length, bare
the ends and connect to the respective terminals as shown on
figure 12. Ensure that the outer sheaths of all cables are
inserted within the cable glands before hand tightening the
gland nuts. USW200 installations require an additional
connection to the solenoid valve as shown
e) Finally, make the connection to the 240V switched mains
supply, leaving it isolated until the tank is partially filled and
the system is ready to be commissioned.
f) Insert the ribbon cable in the fascia circuit board connector,
push the brown locking collar back into position, then replace
the housing cover.
g) Connect the vent tube to the left hand port on the underside
of the housing as shown. The tube can be cut to length and
run to a convenient location such as the services pipe to
prevent ingress of dirt or water.
h) For USW200 installations, connect the level sensing tube to the
right hand port on the underside of the housing.
Plumbing connections
Note: when using the Equator push fit system, always cut the
pipe square using a Marley pipe cutter or similar and ensure that
the pipe is inserted into the fitting socket to a depth of 25mm.
An Equator pipe support sleeve must be inserted into the pipe
end before the joint is made. More detailed installation guidance
is given in the Equator Design & Installation guide.
USW100 – garden irrigation
Complete the connection between the discharge hose in the inlet
chamber and the 15mm Equator supply pipe, then connect the
other end with appropriate fittings to the wall tap assembly. To
complete the installation, connect a length of 4mm bore tubing
between the port on the ‘T’ fitting to the port on the side of the
control housing.
USW200 – domestic back up
Note: domestic back up installations require the use of a loft mounted
header tank with a dual supply of mains and recycled water.
In order to prevent pollution of the mains water supply by
backflow it is essential that the installation complies with the
requirements of the Statutory Instrument 1999, No 1148 – ‘
Water Supply (Water Fittings) Regulations 1999’. The level of
protection specified by the Regulations can be met by adopting
the design requirements of BS EN 13077: 2003, relevant details
of which are given in figure 13.
a) Complete the supply pipe connection in the inlet chamber as
for USW100, then connect the other end to the ‘Y’ filter of the
fittings assembly as shown on figure 3
b) From the isolation valve connect a supply with a Torbeck type
inlet valve to the loft mounted header tank (See figure 13)
c) If a separate supply pipe is required to provide recycled water
to an external tap, it can be inserted between the isolation
valve and the header tank
d) Connect the solenoid valve to a mains water supply, making
sure that the electrical connection tags are pointing in the
direction of flow. From the solenoid valve connect a secondary
supply with a Torbeck valve to the header tank. (See figure 13)
e) Once the supply, feed and overflow connections have been
made and tested, fit a Byelaw 50 insulation kit to the tank and
lid and lag all exposed pipework within the loft space. Note:
the use of Torbeck type inlet valves is preferred to conventional
ball valves as they provide a more positive shut-off
characteristic and are more suitable for use with a pressure
based pump control system.
f) Finally, to complete the installation, connect a length of 4mm
bore tubing between the port on the ‘T’ fitting to the port on
the side of the control housing.
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